1x advanced is developed based on the CDMA2000 1x technology, while it brings a great voice capability enhancement to the current CDMA2000 1x system. By taking advantage of the following set of enhancements, 1x advanced can theoretically triple/quadruple the CDMA2000 voice capacity, which in turn frees up spectrum for 1x EV-DO broadband data services:
EVRC-NW vocoder uses different combinations of several kinds of frame rates according to specific conditions in order to lower the average data rate.
With smart blanking, some traffic frames will not be transmitted when traffic patterns have large periods of inactivity. For example, background noise may not be transmitted unless the characteristics of the background noise change significantly. Such technology are used on both forward and reverse link to reduce transmit power and interference.
The frame early termination is a method used to terminate transmission of a frame earlier than the nominal length of the frame if the receiver has successfully received the frame. Again, frame early termination is used on both forward and reverse link to reduce transmit power and interference.
With slow power control, both forward and reverse link power control bits are transmitted at lower data rate (changed from 800Hz to 400Hz or 200Hz), so that overhead power and interference cause by power control can be reduced significantly.
Please refer to the following documents for technical detail:
1. C.S0001-E, Introduction to cdma2000 Standards for Spread Spectrum Systems.
2. C.S0002-E, Physical Layer Standard for cdma2000 Spread Spectrum Systems.
3. C.S0003-E, Medium Access Control (MAC) Standard for cdma2000 Spread Spectrum Systems.
4. C.S0004-E, Signaling Link Access Control (LAC) Standard for cdma2000 Spread Spectrum Systems.
5. C.S0005-E, Upper Layer (Layer 3) Signaling Standard for cdma2000 Spread Spectrum Systems.
When the
Radio Config
is set to
(Fwd11, Rvs8)
, the test set supports 1x advanced functionality by:
(Fwd11,Rvs8)
: See
Radio Configuration
.
Voice Echo
(see
Voice SO Mode
), and the SO75 allows testing of the Fundamental Channel for systems with Forward RC 11 or 12 and Reverse RC 8.
Radio Config
is set to
(Fwd11, Rvs8)
, the test set supports the frame early termination functionality. It's a method used to terminate transmission of a frame earlier than the nominal length of the frame if the receiver has successfully received the frame. (see
Frame Early Termination
)
Radio Config
is set to
(Fwd11, Rvs8)
, the test set supports the smart blanking functionality. Setting the parameter
F-FCH Blanking Duty Cycle
or
R-FCH Blanking Duty Cycle
can determine the period of non-zero rate frame transmission on F-FCH /R-FCH or you can set the parameters to
Blanking Disabled
to disable the smart blanking functionality. (see
Smart blanking
)
Radio Config
is set to
(Fwd11, Rvs8)
, the Forward Power Control has two different
FPC Mode
:
000-Primary 400
and
011-Primary 200
. The MS supports both the inner power control loop and the outer power control loop. Under
(Fwd11, Rvs8)
, when
FPC Mode
is set to
000-Primary 400
, the rate of power control bits is 400 bps; When
FPC Mode
is set to 011-Primary 200, the rate is 200 bps. In addition, two larger power control step sizes are supported when the
Radio Config
is set to
(Fwd11, Rvs8)
(2.0 dB and 1.5 dB). (see
Forward Power Control
)
Radio Config
is set to
(Fwd11, Rvs8)
, the Reverse Power Control has two different
RPC Mode
:
200 to 400 bps
and
200 bps
. (see
Reverse Power Control Setup
)
Radio Config
is set to
(Fwd11, Rvs8)
, the test set will set the RC-BITMAP_CAPABILITY_EXT_ALLOWED bit to be 1 in System Parameters Message (SPM, for Prev-6) and MC-RR Parameters Message (for Prev-7), which enables the test set to process the extended RC bitmap information of F/R-FCH, F/R-SCH, and F/R-DCCH.